I have had a 2018 Sorento LX V6 AWD since September, and I love it.
My previous car was a 2006 Subaru Forester X, which I had for 8 years and almost 120,000 miles. (Traded it at 150,000mi, I got it used at 3 years old and ~30,000mi on it already)
I loved my Forester, and I had pretty good luck with it, though I did end up getting the head gasket leak (common problem with those after a while) and changing them at about 110K miles. $1900 job at the dealership, but it wasn't leaking when I traded it 3 years later. I also had to replace my A/C Compressor.
I got the Sorento because I had another kid and needed a third row. While I loved the Forester, the Sorento is SOOOO nice and smooth, I am glad I got it. With regards to the third row, I found even I could sit in it comfortably, and I am 6' tall. The only drawback is the floor is higher and the seat is lower there, so my knees were up fairly high. (Also getting out is awkward) but the kids (6 yrs and almost 12 yrs old) have no problem and they love it back there.
So far I have had no regrets at all. I did go with the convenience package (upgraded infotainment, heated front seats, power adjustable drivers seat, automatic climate control and 3rd row heat/ac, digital speedometer, blind spot monitoring and rear cross traffic alert) but that package is totally worth the few extra thousand dollars, in my opinion.
I think the Ascent is supposed to be pretty big, longer and a bit wider than the Sorento. So to me, the Sorento is easier to park (suprisingly easy, considering how much bigger it is than my Forester) and easy to fit in my short driveway.